//
// Manta - Structural Variant and Indel Caller
// Copyright (c) 2013-2019 Illumina, Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
//

/// \file
/// \author Chris Saunders
///

#pragma once

#include <iosfwd>
#include <memory>
#include <string>

/// provide an output stream which comes from either a file or a tty default
///
struct OutStream {
  explicit OutStream(const std::string& fileName);

  ~OutStream();

  std::ostream& getStream()
  {
    if (!_isInit) initStream();
    return *_osptr;
  }

private:
  void initStream();

  static void openFile(const std::string& filename, std::ofstream& ofs);

  bool                           _isInit;
  std::string                    _fileName;
  std::ostream*                  _osptr;
  std::unique_ptr<std::ofstream> _ofsptr;
};
